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Browsing Геология России by Title
Now showing items 2995-3014 of 39126
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(1989)Modal and chemical data for variably-depleted peridotites of oceanic origin together with estimates of the composition of fertile parental peridotite are used to define an oceanic trend. This trend is most clearly illustrated ...
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(2001)The first critical review of geological and petrochemical materials based on the author's data is presented for the Mesozoic mafic rocks of northern Transbaikalia. The rocks are demonstrated to be localized within a series ...
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(1988)To study the composition of the different ilmenite generations and clarify their evolutionary patterns, we sampled 28 kimberlite pipes in different fields of Siberia. In all, we analyzed 200 microcrystalline ilmenite grains ...
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(1988)Our data on aqueous extracts from inclusions opened by griding were obtained by the Moskalyuk method. We studied near-surface occurrences of cassiterite-silicate ore; associated with volcanoplutonic complexes in the Krest ...
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(2004)Steenstrupine from igneous rocks (foyaites and lujaurites) of the Lovozero alkaline massif was studied for the first time. Unlike the early magmatic steenstrupine of the Ilimaussaq massif, the Lovozero steenstrupine is a ...
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(2003)A geometrical structure is imposed on compositional data by physical and chemical laws, principally mass conservation. Therefore, statistical or mathematical investigation of possible relations between data values and such ...
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(Федеральное государственное бюджетное учреждение науки Геофизический центр Российской академии наук, 2015)A representative collection of spinel lherzolite xenoliths in Cenozoic basalts from the Baikal Rift (Khamar-Daban Range, Vitim Plateau, and Udokan Plateau), Tien Shan, Bohemian Massif, Pannonian Basin, Catalonia, central ...
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(2001)Compositional data are very common in the earth sciences. Nevertheless, little attention has been paid to the spatial interpolation of these data sets. Most interpolators do not necessarily satisfy the constant sum and ...
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(1999)This paper illustrates some problems involved in the quantitative compositional study of pyroclastic deposits and proposes criteria for selecting the main petrographic and textural classes for modal analysis. The relative ...
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(2006)Group IID is the fifth largest group of iron meteorites and the fourth largest magmatic group (i.e., that formed by fractional crystallization). We report neutron-activation data for 19 (of 21 known) IID irons. These confirm ...
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(1996)Interstitial glasses and glasses in small inclusions in Mg-rich phenocrysts of 14 boninites from New Caledonia, the Mariana Trench, Cape Vogel and Chichi-jima were analysed by electron microprobe and the water contents ...
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(Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования «Пермский государственный национальный исследовательский университет», 2017)The article considers a chemical variation of accessory and ore-forming chrome spinels from the Kraka ultramafic massif at the different scales, from the deposit to the thin section. A correlation analysis of compositional ...
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(1996)Pyroxene and mica found in plutonic rocks of the Little Murun ultrapotassic pluton exhibit trends of compositional evolution that permit evaluation of the differentiation sequence of the complex. Pyroxene evolves from ...
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(2004)Oulankaite. a complex base- and precious-metal stannosulfotelluride from the Nadezhda deposit in the Lukkulaisvaara layered intrusion. northern Karelia, northwestern Russia, exhibits a considerable variation in composition. ...
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(2005)A series of natural sphalerite samples, characterized by an inhomogeneous (zonal) distribution of Fe, Mn, and Cd atoms substituting for Zn, has been investigated by electron probe micro analysis and X-ray element distribution ...
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(2004)Crystalline and melt inclusions were studied in garnet, diopside, potassium feldspar, and sphene from the garnet syenite porphyry (sviatonossite) of the Mushugai-Khuduk carbonatite-bearing complex in southern Mongolia. ...
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(1982)Solubility experiments were performed at 30 kbars in the system Mg2SiO4-SiO2-H2O, and at 20 and 30 kbars on omphacitic pyroxene-water mixtures. They confirm that the solubility of the forsterite component in aqueous fluids ...
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(2005)The concentrations of P, V, Cr, Fe, Co, Ni, Cu, Ga, Ge, As, Mo, Ru, Rh, Pd, W, Re, Os, Ir, Pt, and Au in the group IVB iron meteorites Cape of Good Hope, Hoba, Skookum, Santa Clara, Tawallah Valley, Tlacotepec, and Warburton ...
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(2002)The apatite-group minerals of the general formula, M10(ZO4)6X2 (M = Ca, Sr, Pb, Na…, Z = P, As, Si, V…, and X = F, OH, Cl…), are remarkably tolerant to structural distortion and chemical substitution, and consequently are ...
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(1989)Transform-fault zones are among the three types of plate boundaries recognized in new global tectonics. Although the volcanic activity in these zones undoubtedly occurs on a smaller scale than on the two other types of ...
Now showing items 2995-3014 of 39126